I'm cautious when I say similar to Demon's Souls, but that's honestly the vibe I get at the moment. If it's on normal then it'll likely feel like a typical RPG hack 'n' slash, but on hard having to roll, block and parry is very similar to DS, and so is the punishment should you fail.

The developers cited DS as an inspiration in one of their developer interview things on Gamespot or Gametrailers I think, so I guess it's not too surprising to see some similarities.